BL-21785-000 Knowles Acoustics, BL-21785-000 Datasheet
BL-21785-000
Specifications of BL-21785-000
BL-1785
BL-21785
BL1785
Related parts for BL-21785-000
BL-21785-000 Summary of contents
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... Acoustic Interface Design Guide MEMS MICROPHONES ECMs SPECIALTY MICROPHONES SPECIALTY SPEAKERS CUSTOM ASSEMBLIES ACOUSTIC SOFTWARE MICROPHONE AND SPEAKER BASICS ...
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... Knowles reserves the right to change designs and specifications without prior notice. Should a safety concern arise regarding this product, please contact us immediately for technical consultation. Knowles cannot assume responsibility for any problems arising out of the use of this product. This information does not convey any license by any implication under any patents or other right. ...
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... For support from concept to design to sub-assembly, or any step along the way, just call us. Or visit us at www.knowles.com Table of Contents MICROPHONES - MEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 MICROPHONES - ECMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8 SPECIALTY TRANSDUCERS - MICROPHONES . . . . . . . . . . . . . . . . 9-14 ACCELEROMETERS & DAMPERS . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 SPECIALTY TRANSDUCERS - SPEAKERS . . . . . . . . . . . . . . . . . . 15-23 CUSTOM ASSEMBLIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 ACOUSTIC SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 MICROPHONE AND SPEAKER BASICS . . . . . . . . . . . . . . . . . . . . 26-27 www.knowles.com 3 ...
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... Design variables include ever-smaller sizes, lower profiles and mounting options, increased output capacities, and new digital audio options that eliminate analog noise. For manufacturers, surface mount designs eliminate off-line subassembly production costs ...
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... Rugged, solid-state design process for stable acoustic performance under extreme conditions such as temperature, shock and vibration • Digital - Pulse Density Modulation (PDM) device available, which has an integrated sleep mode and is compatible with stereo input applications Description Directivity SPM0204HE5 Standard ...
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... MICROPHONES – ECMs Electret Condenser Microphones Electret Condenser Microphones (ECM) are for general use in all electronic products requiring a microphone. ECMs provide good acoustic performance and reliability under non-severe environmental conditions. • Highly efficient electrical specifications • Industry standard sizes • ...
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... Part Number Sensitivity (db) Filter MD9745APA-1 -41.0±3 10pF MD9745APZ-F -42.0±2 None 9.7x4.5 FREQUENCY RESPONSE 10k FREQUENCY (Hz) www.knowles.com MICROPHONES – ECMs Filter Termination Solder Type Solder Type Solder Type Pin Type PCB, Bullseye Solder Type Solder Type 6x1.5 FREQUENCY RESPONSE -10 -20 - ...
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... Multiple value added models with cable wire leads and connectors along with rubber boot housings that all meet current RoHS standards are available • Outsource your existing assembly that contains a Knowles component, and maintain control of drawings and process • ...
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... Other variables include size, shape, amplification, sensitivity, low noise, and resistance to vibration and mechanical shock. ST components and assemblies are unique in fit, form and function. Our products are designed into high value applications in markets such as the following: • ...
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... Noise Canceling 4.00 x 5.59 x 2.28 (mm) The NR Series close talking microphones deliver state-of-the-art noise canceling performance. NR microphones are used as headset microphones in the most demanding communication and speech recognition environments. The NR Series microphones are available in boom microphone packages. (See the FB Series and PNR/PWP Series for details.) • ...
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... Two case sizes available Sensitivity @ 1kHz DC Supply (Vdc Dimensions (dB re1V/1Pa) BL-21671-000 7.9 x 5.6 x 4.1 -34.5±3 BL-21671-140 7.9 x 5.6 x 4.1 -34.5±4 BL-21785-000 7.9 x 5.6 x 2.3 -49.0±3 BL-21994-000 25.4 x 12.7 DIA -49.0±3 BL-23497-000 25.4 x 12.7 DIA -49.0±3 BL-27046-000 7.87 x 5.54 x 2.23 -49.0± ...
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... Knowles’ waterproof microphones survive immersion in water. The WP Series’ form factor is a very small size with low vibration sensitivity. The excellent noise canceling performance is useful for sensors and instrumentation. The WP Series are available in boom microphone packages. (See the FB Series and PNR/PWP Series for details.) • ...
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... FB SERIES – Boom Microphone FB Series are available in metallic, flexible boom styles, which utilize a wide array of microphone elements, giving superb noise rejection and high-frequency crossover of near and far field responses. FB’s are utilized in a variety of aircraft audio systems and radio communication helmets. Knowles offers customized lengths and end terminations to meet your application needs. • ...
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... BU Series Accelerometers are frequently used as contact microphones for radio communications in high noise environments such as firefighting or combat. The accelerometers reproduce voice signals from vibrations at the throat or from bony parts of the head, and are compatible with helmet or headset applications. • Ceramic vibration transducer • ...
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... Knowles sub-miniature speaker designs are based on balanced armature technology and are utilized in a variety of high performance audio and communication products. Knowles balanced armature speakers are available in several sizes and efficiencies, which can be finely tuned to meet your specific performance requirements. They are designed for use in in-ear applications, including earphones and communication earpieces sub-assembled by Knowles for premium consumer electronics accessories ...
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... Undamped, screen damped, internally damped, and Ferrofluid damped responses • Various port locations, coil impedances, damping options, termination configurations, and frequency responses available • Maximum SPL output of 123dB at resonance peak, 109dB at midband (500Hz)* Sensitivity @ 1kHz ...
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... FC. • High-output technology provides double (+3dB) the maximum acoustic output of existing Knowles FC Series speakers • Maximum output comparable to Knowles’ ED Series speaker in a package size only 68% as large! • Same size and dimensions as Knowles’ EH Series • ...
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... Balanced Armature Amplified Speaker 6.32 x 4.29 x 2.99 (mm) Based on Knowles’ versatile and popular ED speaker, the EP series adds the benefi internal Class-D amplifier. Its compact size and appreciable output power make the EP speaker suitable for a variety of designs. • ...
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... Balanced Armature Speaker 6.32 x 4.31 x 2.97 (mm) ED SERIES One of Knowles’ most versatile and most popular speakers, its compact size and appreciable output power make the ED speaker suitable for a variety of instruments. • Undamped, screen damped, internally damped, and Ferrofluid damped responses • ...
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... EC-23098-000 108 EC-26368-000 108 – Balanced Armature Speaker 7.87 x 4.09 x 2.79 (mm) TEC SERIES The TEC combines output comparable to the larger BK speaker in an ultra-thin package. The TEC is suitable for multi-element earphone designs. • Ultra-thin • Wideband output • DTEC combines two TEC elements • ...
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... Balanced-armature, magnetic technology to give high efficiency, stability and reliability • High acoustic efficiency enables sufficient sound output even when limited power is available • In-built static protection • ...
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... With its high efficiency and a 143dB SPL maximum output, the CI speaker provides optimal low frequency performance. • Two-terminal zero-bias and three-terminal center-tapped configurations • Various port locations, coil impedances, termination configurations, and frequency responses available Sensitivity @ 1kHz (dB SPL) CI-22748-000 125 CI-22762-000 125 ...
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... Balanced Armature Speaker 25.15 x 25.15 x 9.65 (mm) The CB Series Transceiver offers high electro-acoustic efficiency to conserve power in push-to-talk radio handsets and other battery operated equipment. The CB is available with mounting pins to facilitate assembly board. Model CB-23817-000 is designed to survive submersion in water. • Excellent sound quality • ...
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... Knowles Acoustics. COMPLETE SOLUTION Knowles Acoustics Finished Goods program offers reduced time to market at an ultimately reduced total manufacturing cost of acoustic product ownership. Support in design, application, assembly and testing are all elements included in our services. Off-the-shelf designs are also available. Design Support • ...
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... Acoustic echo cancellation 27dB • Speech bandwidth 8kHz APPLICATIONS Platforms such as tablets, laptops, ultra-mobile personal computers (UPCs), and other mobile computing devices have a number of applications that would benefit from IntelliSonic to enhance the user experience and final product perception. • Language Translation • ...
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... MICROPHONE AND SPEAKER BASICS MICROPHONE AND SPEAKER BASICS MICROPHONES Microphones measure sound pressure. Inside a Knowles microphone is a thin flexible diaphragm, an electrically charged plate, and an amplifier (Fig. 1). The output voltage is proportional to changes in the small separation between the diaphragm and the charged plate (Fig. 2). ...
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SPEAKERS The speaker converts an electrical signal into sound. A cross section of a typical Knowles speaker is shown in Fig. 3. The basic components of the speaker are: a coil of wire, a metal U-shaped reed called the armature, ...
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... Knowles North & South America World Headquarters Manufacturing Sales & Application Engineering Knowles Acoustics maintains sales, marketing, engineering and manufacturing globally. For immediate assistance on your specific requirements, please call the nearest facility listed below. AMERICAS: EUROPE: Knowles Acoustics Knowles Acoustics ...